Methods of experiment design require performing measurements in selected input space points of a model of the object measured. To make it possible, an object must have a property called controllability. In the paper, controllability criteria have been formulated based on the fundamental principles of metrology. In addition, restrictions of controllability of certain objects of measurement have been described. Finally, consequences of disregarding the criterion for controllability occurring at a stage of the verification of the model have been described.
XVII IMEKO World Congress · TC15 · 2003 · Download
These article sums our calculations and experiments of "lemon"/"barrel" shaped bodies; we’ve analyzed 4 methods for the measurements of the important parameters and calculated the uncertainty of each method.
XVII IMEKO World Congress · TC14 · 2003 · Download
The measurement of elements of Roll-Works is difficult, because the roughness and the profile-curves are important for the quality of production. Specifications of quality-parameters are not given, but the effects of fault Roll-Works we can see. Through the measurement and the analysis with graphs, which showed the differences in the profile-curves, we recognized the characteristic differences of the faulty Elements of Roll -Works. The transparencies allow the visual control of the elements, which is an easy method to find out the quality parameters for our problem.
XVII IMEKO World Congress · TC14 · 2003 · Download
There are many kinds of geometrical gauges used for calibration of machine tools and coordinate measuring machines (CMMs). A step-gauge is a kind of calibration gauge. It consists of many short gauge blocks and a base bar. Gauge blocks were directly calibrated by an interferometer using method of exact fraction. The method, however, does not apply to the calibration of step-gauges because of their complicated structure. The calibration works are very important missions in national metrology institutes (NMIs). We developed the step-gauge calibration system that consisted of a CMM and an...
XVII IMEKO World Congress · TC14 · 2003 · Download
The presented paper describes the model of integrated computer-aided measuring and a special system for in-process measuring on flexible manufacturing turning system. The system was implemented in practical use on flexible turning system.
XVII IMEKO World Congress · TC14 · 2003 · Download
Jae-Hwa Hong, Jeong-Mok Kim, Eun-Do Kim, Gi-Deok Park, Kyu-Sam Hwang, Soon-Ju Kwon
An on-line measurement system for phase fraction and alloying degree of galvannealed steel has been developed using an X-ray diffraction method. Intensities of diffraction peaks of Γ, δ, ζ and η iron-zinc phases were utilized for the determination of each phase fraction and alloying degree. Calibration curves were constructed using laboratory prepared standard reference samples and multiple regression technique. The system has been employed in POSCO’s galvannealing line at Kwang Yang Works for process monitoring.
XVII IMEKO World Congress · TC14 · 2003 · Download
In this paper presented is the research on developing of a model of CMM based on application of artificial neural networks. The work focused on developing a conception of large CMMs’ errors. Described here is the large CMMs’ error identification method that utilises standard plate and laser interferometer, and presented are the possibilities of its application for development of measurement machine model. So developed method enables to carry out assessment of large CMMs’ accuracy, while related to it a CMM model is being utilised for the realised measurements’ accuracy assessment.
XVII IMEKO World Congress · TC14 · 2003 · Download
Dirk Stöbener, Matko Dijkman, Dennis Kruse, Holger Surm, Olaf Keßler, Peter Mayr, Gert Goch
Tactile distance measurement systems with uncertainties in the micrometer range cannot be used in hot environments with temperatures above 800°C. A green laser-triangulation system with appropriate optical filters can meet these requirements. A measuring system was build up and tested at room temperature and in two different heat treatment furnaces at temperatures up to 900°C. Good linearity of the system and acceptable correspondence between measurements and published reference values could be observed. The results show the suitability of the system for distortion measurements in heat...
XVII IMEKO World Congress · TC14 · 2003 · Download
For calibration of displacement measuring sensors with sub-nanometer resolution, a novel calibration system using laser interferometer was developed. It is directly traceably to the Meter and portable due to use of laser coupled by an optical fiber. And also it has a higher accuracy because of nonlinearity free laser interferometer and compact design. The detailed system and one example of calibration are described. Finally a detailed uncertainty budget is described.
XVII IMEKO World Congress · TC14 · 2003 · Download
T. Watanabe, H. Fujimoto, K. Nakayama, M. Kajitani, T. Masuda
In this paper, we propose the new calibration measurement method of a polygon mirror. The measuring method of the conventional polygon mirror that uses an index table needs much technical skill, much time, and the amount of work. We used the Equal-Division- Averaged (EDA) method and have already developed the self-calibration system that calibrates the angle graduation signal of two sets of rotary encoders simultaneously. By combining this system and a polygon mirror, it becomes possible to measure the angle between faces of a polygon mirror. Now, in Japan, the angle traceability system...
XVII IMEKO World Congress · TC14 · 2003 · Download